Pavement
- Publication no: AP-T230-13
- ISBN: 978-1-921991-82-0
- Published: 20 March 2013
- PDF (free) Download
This report presents the results of the laboratory testing program conducted in support of the validation trial of warm mix asphalt (WMA) and hotmix asphalt (HMA) conducted in Melbourne, Australia, between 2010 and 2012. Although the intention was to prepare all the mixes and carry out all the testing in the same manner, certain variations occurred (e.g. prolonged mix storage time, over/under compaction of specimens, laboratory equipment and staffing issues) and it is possible that these variations may have influenced some of the test results. As a result, the analysis reported, while based on the available data, should be treated with caution. However, it needs to be noted that the field performance of all the test sites was excellent, with no difference between asphalt mix type (WMA/HMA), the two types of WMA tested (additive and foam) and the percentage of RAP (05-50%).
- 1. Introduction
- 1.1. Austroads Project TT1454
- 2. Warm Mix Asphalt
- 2.1. WMA Evaluation Protocol
- 3. Details of validation trial and summary of laboratory testing program
- 3.1. Details of Mixes Tested
- 3.2. Details of Laboratory Tests
- 3.2.1. Variations from the Protocol
- 3.2.2. Laboratory Versus Plant Mixes
- 4. Results of laboratory testing
- 4.1. Mix Composition
- 4.2. Volumetric Tests
- 4.2.1. Gyratory Compaction
- 4.2.2. Marshall Compaction
- 4.2.3. Marshall Stability and Flow
- 4.3. Indirect Tensile Modulus
- 4.4. Moisture Sensitivity
- 4.4.1. Laboratory Compacted Samples
- 4.4.2. Field Cores
- 4.5. Wheel Tracking
- 4.6. Fatigue
- 4.7. Binder Viscosity
- 4.7.1. Viscosity of Fresh Binder
- 4.7.2. Viscosity of Recovered Binder
- 4.7.3. Typical Viscosity of Recovered Binders
- 5. Summary of Laboratory Testing
- References